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biom.table.Table._get_col

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biom.table.Table._get_col

Table._get_col(col_idx)

Return the column at col_idx.

A column vector will be returned as a scipy.sparse matrix in csc format.

Notes

Switching between slicing rows and columns is inefficient. Slicing of rows requires a CSR representation, while slicing of columns requires a CSC representation, and transforms are performed on the data if the data are not in the required representation. These transforms can be expensive if done frequently.

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